| Spin-polarization-dependent transport in a quantum dot array coupled with an Aharonov-Bohm ring |
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| 引用本文： | 王瑞,孔令民,周运清,张存喜,邢志勇. Spin-polarization-dependent transport in a quantum dot array coupled with an Aharonov-Bohm ring[J]. 中国物理 B, 2010, 19(12): 127202-127202. DOI: 10.1088/1674-1056/19/12/127202 |
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| 作者姓名： | 王瑞 孔令民 周运清 张存喜 邢志勇 |
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| 作者单位： | (1)Department of Physics, Zhejiang Ocean University, Zhoushan 316000, China; (2)Xiamen Ocean Vocational College, Xiamen 361012, China |
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| 基金项目： | Project supported by the National Natural Science Foundation of China (Grant Nos. 10947163 and 10947164). |
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| 摘 要： | In this paper the quantum transport in a dot-array coupled with an Aharonov–Bohm (AB) ring is investigated via single-band tight-binding Hamiltonian. It is shown that the output spin current is a periodic function of the magnetic flux in the quantum unit Φ0. The resonance positions of the total transmission probability do not depend on the size of the AB ring but the electronic spectrum. Moreover, the persistent currents in the AB ring is also spin-polarization dependent and different from the isolated AB ring where the persistent current is independent of spin polarization.
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| 关 键 词： | spin-polarization transmission AB ring current |
| 收稿时间： | 2010-03-12 |
| 修稿时间： | 2010-08-03 |
Spin-polarization-dependent transport in a quantum dot array coupled with an Aharonov–Bohm ring |
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| Wang Rui,Kong Ling-Min,Zhou Yun-Qing,Zhang Cun-Xi and Xing Zhi-Yong. Spin-polarization-dependent transport in a quantum dot array coupled with an Aharonov–Bohm ring[J]. Chinese Physics B, 2010, 19(12): 127202-127202. DOI: 10.1088/1674-1056/19/12/127202 |
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| Authors: | Wang Rui Kong Ling-Min Zhou Yun-Qing Zhang Cun-Xi Xing Zhi-Yong |
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| Affiliation: | Department of Physics, Zhejiang Ocean University, Zhoushan 316000, China; Xiamen Ocean Vocational College, Xiamen 361012, China |
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| Abstract: | In this paper the quantum transport in a dot-array coupled with an Aharonov–Bohm (AB) ring is investigated via single-band tight-binding Hamiltonian. It is shown that the output spin current is a periodic function of the magnetic flux in the quantum unit Φ0. The resonance positions of the total transmission probability do not depend on the size of the AB ring but the electronic spectrum. Moreover, the persistent currents in the AB ring is also spin-polarization dependent and different from the isolated AB ring where the persistent current is independent of spin polarization. |
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| Keywords: | spin-polarization transmission AB ring current |
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